Tueket lathe



(NoModel.) l 2 Sheets- #Shee-t 1. C. S. SHERMAN.

TURRBT LATHE. No. 423,088. Patented Mar. 11, 1890.

N. Pn ccccccc ru hhhhhhhhhhhh hinge nnnnn c.

(NoModel.) 8 zsheets-sheet-z.

C. S. SHERMAN.v

Y TURRBT LATHE. No. 423,088. Patented Mar. 1.1, 1890.

UNITED STATES PATENT OFFICE.

CHARLES S. SHERMAN, OF VINDSOR, VERMONT, ASSIGNOR OF ONE-HALF TO Tl-IE VINDSOR MACHINE COMPANY, OF SAME PLACE.

TU RRET-LATH E.

SPECIFICATION forming part of Letters Patent No. 423,088, dated March 11, 1890.

Application filed August 8, 1889- Serial No. 320,101. (No model.)

To LZZ whom it mary concern:

Be it known that I, CHARLES S. SHERMAN,

a citizen of the United States, residing at Vindsor, in the county of Tindsor and State of Vermont, have invented certain new and useful Improvements in Turret Machines or Lathes; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

My invention relates to certain new and useful improvements in machines for making machine-made screws, sometimes known as turret-machines, or screw-machines.

The object of the invention is to provide a novel and'simplilied feeding mechanism for the wire that is to be operated upon; also to improve and simplify the construction of the chuck employed, and,`further, to provide a cut-off which will be novel in construction, readily operated and adjustable horizontally and vertically, and to theaccomplishment of the above the invention consists in certain novel features and combination of parts, aswill be hereinafter fully described and specifically claimed, reference being had to the accompanying drawings, in which- Figure 1 represents a side elevation of a complete machine; Figs. 2, 3, and 4, details of the chuck as constructed by me, and Figs. 5, 6, and 7 detail sectional and elevation views of the cut-off mechanism and parts employed in connection therewith. Fig. S is a View in detail showing a modified form of the stop; and Fig. 9 a view in detail of the forked lever used in connection with the chuck. l

In the drawings I have showna stand of ordinary construction consistingof the upper bed-plate A, supported by suitable feet upon a lower bed-plate A', the latter being also provided with suitable legs and forming a suitable oil-drip pan, as commonly used in this class of machines.

Mounted upon one end of the bed-plate A is a slide-bed B, on which is mounted a slide B, which carries a revolving turret B2, all

feeding device will be carried forward and such parts being of well-known construction and operated in the usual manner.

At the opposite end of the plate A a headblock C is mounted. At one end of such head-block is a grooved bar or guideway D, upon which is mounted a'wire-feeding device D', this device consisting of an upright provided at a point near its upper end with a suitable collar a, through which the wire is passed, such wire being secured to such collar by means of a suitable set-screw a. v

To the lower end of the upright forming the feeding device D there is secured one end of a rope or cord E, which is carried forward, where it passes over a roller E', mounted nin a suitable extension E2, said cord or rope thence passing1 down and under a pulley E3, which is secured to a suitable shank connecting with the weight F, the cord thence passing upward and being secured at its other end to the end of the extension-support E2, hereinbefore referred to.

By the arrangement of parts as hereinbefore described it will be seen that the wiretoward the chuck and tool-carrying turret by means of the weight F, unless acheck to said feed is provided. n

Grepresents a lever, which is pivoted to the bed-plate A and connected at its short end with an arm h, which in turn is connected to a lever b', forked at its upper end, as indicated at b2, Fig. l, and pivoted in the arm c, secured to the head-block C. The forked upper end of the lever b is arranged to enter a groove c', formed in a ring I-I, now to be de'- scribed, such ring forming part of the chuck.

The construction and arrangement of the chuck are shown clearly in Figs. 2, 3, and 4, and by reference to such gures it will be seen to consist of the base-piece'I, provided with suitable inclined grooves d, the said base-piece being adapted to enter a ring .I in which said ring are pivoted two levers d', each of which is adapted to tit into one of 95 the grooves d of the base-piece I, and when acted upon by suitable pins, to be hereinafter described, to hold such parts rmly in position.

vTo the forward end of the ring J apiece J loo is secured by means of suitable screw-threads, such piece being provided at its forward end with an angle e, arranged to act upon a puppet, to be hereinafter referred to.

K represents a ring adapted to fit over all the parts hereinbefore named, such ring being provided with thev groove c', arranged to accommodate the forked end of the lever b', 'as before described, and such ring carrying pins f, which are adapted to be screwed down upon the levers d', which hold t-he parts K, J, and I securely together. L represents a series of annular jaws, which are of well-known construction and are adapted to be operated upon by the angle of the piece J', the entire chuck, consisting of the parts described, being adapted to be moved ina horizontal plane by means of the levers described, one movement causing the closing of the series of annular jaws by causing the incline e to ride upon the inclined surfaces of the jaws, which will thereby be brought together to grasp the wires and the consequent holding of the Wire, thus preventing it from being fed forward, and the reverse movement of such levers disengaging the parts-that is, freeing the jaws from the incline e-whereupon the pull upon the wire caused by the feed will force the jaws apart, thus allowing of the feed.

In Figs. 5, 6, and 7 I have'shown the cutting mechanism and parts connected therewith, which will now be described.

M represents a base-plate suitably mounted upon the bed-plate A and provided on its up- 1 per face with a suitable dovetailed proj ection g, such projection being adapted to move y in a dovetailed groove formed on the lower face of the plate M', which is adapted to carry the cutting mechanism.

Mounted in base-plate M is a shaft N, secured to one end of which is a lever N', by means of which said shaft may be revolved. The shaft N also carries a sleeve h, upon which is formed a projection h', adapted to l engage a set-screw t', which is mounted in the frame-work of the machine, such parts limiting the revolution of the shaft N and decidj ing the length of feed or movement of the table carrying the cutting mechanism. The

sleeve 7L is also provided with a second stop j, i

in which is mounted a set-screw j', this serving as an additional stop arranged to strike against the frame-work of the machine and the shaft N is screw-threaded, as shown clearly in Fig. 5, and. mounted upon such end is a screwthreaded nut P, 'which is provided with a handle P. Loosely mounted upon the shaft N is a worm-wheel Q, which is arranged to engage a worm Q', and intermediate the nut and worm-wlieel I placeasleeve Q2, as shown. This worm-wheel Q is so arranged as to be operated upon by the sleeve Q2, through the medium of the nut P, and when the handle of such nut is turned the worm-wheel is moved along the shaft N, by means of the nut being brought into contact with the hub of such wheel, until it engages the cog-wheel .0, hereinbefore referred to, thus forming a friction-clutch, and which, upon the further operation of the handle P', will cause the revolution of such cog-wheel, and consequently the movement of the table M.

The table M is provided with a sufficient number of dovetailed slots to accommodate as many tool-holding devices as are employed, the arrangement shown inthe drawings having two such, such slots being provided to allow of the transverse adjustment of such tool-holding devices.

The tool-holder consists of the following parts: A yoke-shaped upright R, which is provided on its lower end with a suitable dovetailed projection 'to enter a dovetailed slot 7c. Two wedge-blocks S S' are located within this upright R, and upon the upper face of the uppermost of such blocks a cutting-tool T is mounted, said tool being h eld in 'place by a suitable set-screw Z, passing through the upper end of the yoke R and pressing upon the upper face of the tool. The wedge-blocks S S', hereinbefore referred to, are arranged, as shown in Fig. 7, to slide one upon the other, such blocks being wedgeshaped, and the vertical adjustment of the cutting-tool being provided for by the use of a suitable screw m, which is passed into openings formed in each of said blocks, the operation being such that when the screw is driven in the uppermost block S' will be elevated, and upon the loosening of such screw said block will be lowered.

In Fig. 8 I have shown an additional modification of the stop used in connection with the mechanism for operating the cutter-carrying table, the forni shown in such View being adapted to use as what I call an inside stop, and intended for use in connection with small machines, where it runs light and quick, and the screws are small and can be cut off with the lever. It consists, as shown, of two adjustable bolts passed through the downward extension of the frame-work and arranged to engage with a projection on the shaft n, the adjustable bolts being marked n2 in such figure and the projection formed on the shaft 77,3.

In Fig. 9 I have shown in detail the forked lever b', each arm of' the fork of such lever being shown as provided with a small fric- IOO tion-roller b3, adapted to enter the groove c', hereinhefore referred to.

Having thus fully described nly invention, what I claim as new therein, and that'for which I desire to secure Letters Patent, iS-n l. In a screw-threading machine, the combination, with a grooved guide, of an upright moving thereon, a ring and set-screw mounted in such upright, and a weighted cord oonnected therewith, as set forth.

2. In a chuck for a screw-threading machine, the combination, with a hase-piece provided with inclined grooves, a ring surrounding the same, and levers pivoted therein, such ring provided with an angle, of a puppet, a grooved ring surrounding such parts, and a forked lever connected therewith, as set forth.

3. In a chuck for a screw-threading niachine, the combination, with a hase-piece provided withy inclined grooves, a ring surrounding the same, andlevers pivoted therein, such ring provided with an angle, of a series of annular jaws, a grooved ring surrounding such parts, and a forked lever connected therewith, such lever provided with rollers, as set forth.

4; In a screw-threading machine, the combination, with a cuttercarrying table provided with a rack, ofy a cog, a shaft, a worm- Wheel, a worin engaging said wheel, and a screw-threaded nut mounted on the Shaft, the nut provided with a suitable handle, as set forth.

5. In a screw-threading machine, the combination, with a cutter-carrying carriage, a shaft, and intermediate mechanism for operating the carriage from the shaft, of a projection mounted upon the shaft, and an ad justahle stop suitably mounted, Aas set forth.

6. In a screw-threading machine, the combination, with a cutter-carrying carriage, and a shaft and intermediate mechanism for operating the carriage from the shaft, of a projection n3, mounted on such shaft, and adj ustahle bolts n2, as Set forth.

In testimonT whereof I affix my signature in presence of two witnesses.

CHARLES S. SHERMAN.

Witnesses:

E. H. AUSTIN, KARL W. PERKINS. 

